Machine for the manufacture of paper bags



(No Model.) 3 Sheets-Sheet 1. A. L. STEVENS.

MACHINE FOR THE MANUFACTURE OF PAPER BAGS.

No. 415,950. Patented Nov. 26, 1889.

\ I mum L l HALWLAULAIJ Q Inven tar.

WiimeSses:

hogrzpher, Wuhinglon, n, c.

(No Model.) 3 Sheets-Sheet 2. A. L. STEVENS. MACHINE FOR THE MANUFACTURE OF PAPER BAGS.

No. 415,950. Patented Nov. 26, 1889.

iii/6121501",

Witnesses;

(No Model.) 3 Sheets-Sheet 3.

A. L. STEVENS. MACHINE FOR THE MANUPAGTURE OF PAPER BAGS. No. 415,950. Patented Nov. 26, 1889.

Wi i nesses' Inventor.

UNITED STATES PATENT OFFICE.

ARTHUR L. STEVENS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO THE REMINGTON MACHINE COMPANY, OF W'ILMING- TON, DELA\VARE.

MACHINE FOR THE MANUFACTURE OF PAPER BAGS.

SPECIFICATION forming part of Letters Patent No. 415,950, dated November 26, 1889.

Application filed March 14, 1889. Serial No. 303,232- (No model.)

To all whom it may concern.-

Be it known that I, ARTHUR L. STEvENs, a citizen of the United States, residing at Philadelphia, State of Pennsylvania, have in vented a new and useful Machine for the Manufacture of Paper Bags, of which the followingis a specification.

My invention relates to improvements in that class of paper-bag machines which make either fiat or square bags having tucked bottoms, and comprises certain devices by which the following advantages are secured, viz: to provide a machine that will make bags from a tube of paper fed with a continuous nonvarying speed into the machine, the bottom tuck being formed while the tube is in motion and before the bag-length is severed from tween succeeding bags; that will be positive in its action and retain a firm grip upon the paper without once releasing it until the completed bag is delivered from the machine; that will apply paste to the bottom tuck without danger of throwing "paste when running at high speeds; that will cut or sever the paper into bag-lengths without wide and dangerous revolving parts to interfere with stiff and rigid construction; that will be perfectly adjustable to different sizes and lengths of bags, and that will be capable of working at high speeds, these advantages being attained in the manner illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the machine. Fig. 2 is a transverse section on line AB with the gears 12 and 13 removed, and showing the feed rolls, driving-shaft, and the severing-blade. Fig. 3 is a longitudinal section through the machine on O D, showing the position of the various rolls and bottom-tucking device. Fig. 4 is a plan view of the machine g with the paste-box removed. Figs. 5 and 6 are enlarged sectional views of the gripping rolls, illustrating the manner in which the bottoms of the bags are tucked and pasted.

Figs. '7 and 8 are detailed views of one of the gripping-rolls and mechanism for retarding and accelerating the motion of same; and Fig. 9 is a diagram of the severing device, showing the path of blade and period of greatest acceleration.

Similar reference-signs refer to similar parts throughout the several views.

Upon the base 1 is secured the bed 2. Upon this bed 2, near its back end, and supported in suitable bearings, are the shafts 3 and 4, to which are secured the feed-rolls 5 and 6. The

' shaft 4 is the driving-shaft, and has the tight and loose pulleys 7 and 8, and the hand-wheel 9. Secured to shaft 3is the gearlO, engaging with the gear 11 on shaft 4.. Motion is imparted to the other parts of the machine through the intermediate gear 12 and adjustable gear 13. Upon the forward end of the bed 2 is the movable frame 14, which supports in the fixed bearings 23 the shaft 15, said shaft having secured to it the roll 16, gears 17 and 18, and the cam 19. Loose on shaft 15 is the internal gear 20. ings 23 are placed near the ends of the roll to insure rigidity and smooth running. The top of this roll 16 is at or near the line of tangency of the feed-rolls, so that the paper delivered from the rolls will pass across the top of said roll. Forward and above the roll 16 is the roll 26 on shaft 25, running in the sliding boXes 24. Said shaft has secured to it the gear 27 and the miter-gear 28, which is adjustable by being secured to the shaft by the clamp 29. ends of roll 26, and are forced back by the spring 31, extending across the machine and having its ends resting upon the pins 32, which bear on said boxes. The tension of the spring is adjustable by means of screw 33, the office of this arrangement being to insure an even firm contact between the surface of the two rolls 16 and 26, and yet allow them to spring apart sufficiently to allow varying thicknesses of paper to pass and to further bar against accident in the event the paper wads. the diameter of the gear 17, andhas keyed The bear- The internal gear20 is twice.

The boxes 2e are near the or secured to its hub the changeable gear 22, which in circumference is equal'to twice the bag-length. Between the gears 20 and 17 is the intermediate pinion 21, carried on a stud in the radius-bar 3%. To the end of the radins-bar'is attached the coimecting-rod 35, which is attached by clamp 36 and stud 37 to the lever 38. The lever 38 is fulcrumed on stud in frame 14:, and is provided with a roll or wheel 39 in contact with the cam formed upon the outer rim of the gear 20. (See Figs. 1 and 7 At opposite points on the rim of gear 20 are depressions 451, into which the roll 39 falls by the action of the spring 42, and also by the pressure or thrust of the gears. The gear 20 being twice the diamcterof the gear 17, it will make one-half of a revolution to one revolution. of the latter; and since their motion is in contra directions, and as the gear 20 turns with a constant velocity, it follows that when the radius-bar and pinion remain 'in a fixed position the velocity ratio between the gears 20 and 17 is constant; but when the radius-bar and pinion are being moved around in the direction in which the gear 20 is moving, the angular velhcity ofithe gear 17, and consequently the roll 16, will be'reduced, and, per contra, when th'ebar and pinion are moved around in the opposite direction, the angular velocity of the roll. 16 is increased. As the diam eterof the r0ll16 is greater than one-half the'dianieter ofthe largest change gear, it follows that the surface velocity of the'rol l 16 is greater than the "speed of the paper, (the pinion 21 being in'a fixed'positiom) but as the paper must be in the bightof the rolls 16 and 26 before the bag-length is severed without producing tension'fin the'sainef-in fact, it being desirabl'e tohave a little slack paper betweenthese rlol ls'andg the 'li-neof severance 44Lthe radiusbar is moved at or near the time that the pa;- per en'ters'between the rolls by the r0113!) on lever 38 following the depressions 411 in the can], thus carrying the pinion 21 in. the'same direction the gear 20 is turning, and cans ing'a retardationin the velocity of the rolls until the paper is severed, when, by the roll 39 passing out of the depression in the cam, the

radius-bararid pinionare carried back to their former position, thus accelerating the velocity the rolls and carrying the com; pleted bag in advance of the following paper tube." l

The amount of retardationof the rolls 16 and 26 should be enough to reduce their surface v'elocities'below that of the feed rolls at j the moment when the bag is severed fromthe tube, and this amount of retardation is ad,- ju'sted by the position'of the stud 37 in the slotted end of the lever 38, which regulates the throw or stroke of the radius-bar 34. To make different lengths of bags, a changeable gear 22 is chosen, that is in' circumference twice the desired bag-length, so that the rolls 16 and'26 will always make one revolution toeach bag. The movable frame letv is clanipedby' screws 43 t0 the bed 2 in such a position that the distance from the line of severance 44 to the line of tang-ency between the rolls 16 and 26 is equal to the bag-length 55,"whic h p attached. to blade 53.

minus the sum of the bottom lap, required slack paper, and the length of paper allowed between rolls 16 and 26 at the moment of sev erance.

Supported in suitable hearings on frame 1% is the rock-shaft 45,having arms 16 near each end of the roll 16. Between these arms-is stretched the wire or blade 47/ The center of shaft 45 is so located that when it is rocked to and fro the arc of vibration for the wire 47- is between a point near the bite of the rolls and a point some distance above the plane of the paper as it enters the machine. Between the path of the wire 47 and the roll 26 is the fixed bar 48, having its'edge a little lower than the plane of the paper. Motion is imparted to the wire 47 by the cam 19, fixed to shaft 15, and against which the roller 49, carried at the extremity of an arm on rockshaft 4 5,"isforce d by the spring'50. The ac- ;tio'not the spring forces the wire 4;? down- -ward and agains't'the paper, thus preventing breakage in case the paper should bunch or wad, as" would be the case if it were forced down by the cam. On the topof the frame 14. is the paste-box 51, with its bottom V- shaped, the point of the V beipg over the bar48 and but a little removed from it. At

its lower extremity is the slot 52, in which is suspended the blade 53, one of the functions of which is to form a valve to prevent the outflow of paste. Supported in bearings upon the paste-box is thei ock-shaft 54 ,hay-

ing' an arm carrying the roller 56, and arms ssfthrough slots in. the yoke 57, Attached to the top of the blade is the spring 58, which raises the blade and brings the roller 56 in contact with the cam on the rim of gear 20. As the roller follows the'depressioiis of said cam corresponding in time 120' each succeedin g bag, the blade is slightly raised and, again depressed, thus feeding'a small amountfof paste through the slot 52, where it isw iped offon the bottom of each bag. As the paper tube enters over the roll 16 and between thelower extremity'of the paste-box and thebar 48, the wire 47 descends, tucking or doubling the bottom back upon the tube, and at thesame timewipes the paste from the opening inthe paste-box, as shown in Fig. 5. The wire carries the tucked end' to where it is caught in the rolls 16 and 26. The wire then ascends and pauses for the succeeding bag. This wire or blade 47 being narrower than the bottom tuck, it lies between the point or break of the tuck and'the pasted end, and therefore does not become smeared with paste. In the rolls 16and 26 are hardsteel blocks 59, forming gripping-surfaces that hold the bottomsof'th'elbagswhile the same arebeing severed from the tube. The 130112613 grooved at 60 to prevent any paste that squeezes out of the bottom lap becoming smeared upon thesurface of the roll. Below the roll 26 is a printing-roll 61, having type that is impressed upon each bag as it ICC IIC

passes through the machine; but as this printing device is the subject of another application for Letters Patent by me I do not give a detailed description of it. The rolls 16 and 26 have circumferential grooves 62 for the insertion of guiding-wires (33 and 64. Upon the side of the bed 2 is the extension (55, to which is secured the bracket-bearing 66, in which runs the splined shaft 67. The mitergear 68 on said shaft engages with gear 28 on shaft 25, and has a groove in its hub, into which the end 30 of shaft 25 extends, so that when the frame 14 is moved forward or backward the gear 68 slides on the splined shaft 67 while remaining in mesh with gear To the end of shaft 67 is secured the crank-disk G9, with pin 70, to which is attached 1 71 is the severing-blade 72.

the vibrating slide-bar 71. Secured to bar Upon the extension 65 is the fulcrum-stand 7 3, having the oscillating sleeve 7 4, through which the bar 71 slides. Motion being in the direction of the arrow, Fig. 2, the blade in its upward throw has its velocity accelerated at the time when it severs the paper and gradually retarded and withdrawn to one side by the mo tion of the crank until the end of the blade is clear of the paper tube, when it dips downward and forward and is again accelerated to the severing-point. To time the severingblade with the bottoming device, the machine is turned until abottom is formed, and in the bite of rolls 16 and 20 the clamp 29 is then loosened and the crank turned until the blade strikes the under side of the paper tube. The clamp is then tightened, securing gear 28 to its shaft, thus making the relative time of vibration for blade 71 to correspond with the periodical action of the various other parts of the machine, to the effect that after each bottom is formed and while said bottom is gripped by the rolls l6 and 26 the blade 72 passes across the plane of the paper and severs it by forcing it againstthe'serrated edges of the former 75 and fixed blade 7 6. Great advantages are secured by-this device, which will appear when it is understood that in order to sever the paper properly it is necessary that the upward velocity of the blade at the moment of severance should be several times that of the paper. In machines having ablade revolving upon a simple axis for this purpose the great size and wide path necessary for the sweep of the blade involves a path of the blade is restricted within comparatively short limits and the necessary severing velocity attained by a gradual acceleration to the moment of severance. This enables me to make the parts compact and well supported upon a rigid base. The position of the end of the former and blade 76 is such that the bottom ply of the tube is severed forward of the line at which the remaining ply is severed, with the object of applying paste to the long or bottom ply as it is tucked.

The operation of the machine is, briefly, as follows: Power is applied bybelt to the pulley 7 and the paper tube fed into the machine by the feed-rolls 5 and 6. Motion is communicated to the roll 16 through the intermediate gear 12, adjustable gear 13, changeable gear 22, internal gear20, andpinion 21, mesh ing with gear 17 on shaft 15. B01126 is actuated by means of gears 18 on shaft 15 .and 27 on shaft 25. Motion is imparted to the severing device through gear 28 and 68. By means of the change-gear 22, of suitable size, the various parts of the machine are caused to perform their movements and functions periodically in time with each bag interval. As the pilot end of the tube reaches across the bar 48, the wire or blade 47 descends, tucking the end of the tube and at the same time wiping paste from the lower extremity of the paste-box at 52. As the tucked bottom enters between the rolls 16 and 26, the wire ascends, and the roller 39, following the depressions in the cam on rim of gear 20, actuates, as before described, the radius-bar 3i and pinion 21,t-hereby retarding the velocity of the said rolls sufficiently to cause slack paper between them and the line of severance 44. The blade 72 then ascends, severing the bag-length from the tube. The rolls 16 and 26 are again accelerated in the manner described until the surface velocity is greater than the speed of the paper, thus making an interval or space between succeeding bags. Between or during each bag period the blade 53 is raised slightly and again depressed, excluding a small quantity of paste along the line of opening in pastebox, to be wiped off by the next bag-bottom formed.

Having described my invention,what I claim as new, and desire to secure by Letters Patent, is

1. In a machine for making paper bags, the combination, with feed-rolls having a constant speed, of gripping-rolls having a normal surface velocity greater than but periodically retarded below that of the feed-rolls, and a vibrating severing-blade having its movement timed with the said retardation of the gripping-rolls.

2. In a paper-bag machine in which a paper tube is fed by rolls having a constant speed, the combination of a device for severin the paper tubes into bag-lengths, with grippingrolls having a normal surface velocity greater than that of the said paper tube, but retarded periodically to correspond to the time of severance of said tube into bag-lengths, and again accelerated to produce intervals between the succeeding lengths.

A paper-bag machine having paper-feeding rolls running at a constant velocity, in combination with gripping-rolls having a velocity which is periodically retarded and accelerated, the position of said rolls relative to the feed-rolls being adjustable tov correspond to the different bag-lengths, and a nately and periodically, the severing-blade 72,vibrating tucking blade or wire 47 the fixed bar 48, and the paste-box 5], having an opening or slot in its lower edge to apply paste to the paper as it is tucked by the said wire 47, substantially as set forth.

5. In a paper-bag machine, the combination of paper-feeding rolls, gripping-rolls, and sovering device, with a vibrating tucking blade or wire, a fixed bar over which the paper is folded, and a pasting device in which the box or receptacle containing paste has. a slot or opening along its under side, in which is a blade to act as a valve, and which risesand falls at each bag interval.

6'. In a paper-bag machine, the combination of paper-feeding rolls running at a constant speed, grippin 'rolls which are periodically retarded by means of a gear or pinion which is. intermediate between agear on one of said grippingrolls and a larger internal gear which revolvesat a constant velocity, said intermediate pinion; being moved during the period of retardation with said internal gear,

substantially as set forth.

7. Ina paper-bag machine, the combination of paper-feeding rolls running at a constant velocity, gripping-rolls which are periodically retarded and accelerated by means of' a device consisting-of an. internal gear 20, revolving in adireetion oppositetothat of the gripping-rolls, and a. pinion 21, intermediate between said gear 20 and a gear 17 on the shaft of one of the grippingrolls, said pinion being carricmlv on a radius-barsuch as 34sai.d bar being connected to a leversuch as 38having a roller 39 in contact with a cam on the rim of said internal gear,.by means of which the intermediate pinion is moved with or contra to the motion of said internal gear, substantially as set forth.

8. In a paperbag machine, the combination of paper-feeding rolls, bottom-gripping rolls, and bag-length-severing device, with a gear on the shaft of one of said gripping-rolls,.a larger internal gear, intermediate between said gears, and a pinion carried on a radius-bar which is connected to one end of a lever, having a.roller. atits other endin contact with a cam 011 the rim of said internal gear, substantially as described, and for the purpose set forth.

9. Inapaper-bag machine, the combination of. paper-feedingnolls and bag-length-gripping rolls, with a severing-blade attached to abar having one end connected to a revolving crank-pin and sliding through an oscillatingsleeve, substantially as described.

10. In a paper-bag machine having feeding-rolls and serrated former or cutting blades, the combination of gripping-rolls and bottomtucking blades, with a vibrating severingblade, the motion of which is accelerated at the time of severing the paper, but retarded and withdrawn to one side during its downward stroke.

11. In a paper-bag machine, feed--rolls running at a constant velocity, a vibrating blade which tucks or folds the bottom lap on the pilot end of the paper tube before the baglcngth is severed, a paste-receptacle having an opening or slot from which the paste is wiped by the bottom lap, bottom-gripping rolls which have a normal velocity greater than the paper, but which are retarded to below that velocity at the time the bottom lap enters loetween them, said rolls being adjustable in their relative distance from the feedrolls to correspond to the different lengths of bags, and a vibrating blade-which seversthe paper into bag-lengths while the bottoms are 1 between the gripping-rolls.

12. In a paper-bag machine,thecombination of the bottom-gripping rolls 16 and 26 and fixed bar 48, with the rock-shaft 45-, having arms 46 and tucking blade or Wire 47, the

'roller 49, carried 011- an arm on said rockshaft, the cam 1 9, and: spring 50, substantially as described.

13. In a bag-machine, the bottom-gripping rolls 16 and 26, the fixed bar 48, and vibrating wire 47, in combination with the pastebox 51, having a slot or opening 52 in its lowerextremity and near-the bar 48, said slot being closed by a. valve or blade 53, which is raised to feed paste toeach bag-bottom, substantially as described.

14. In a paper-bag machine, the movable frame 14, supporting the roll 16in fi'xed'bearings, and the roll 26, being supported in sliding boxes, the spring 31, toforce said roll against the roll 16, the miter-gear 28 onthe shaft of said roll 26, the splined shaft 67, miter-gear. 68, crank having pin 70, oscillating sleeve 74, and bar 71, with severing-blade 72,

substantially as described, and for the purpose set forth.

15. In a paper-bag machine, the shaft 15, having roll 16 and gear 17, secured thereto, the internal gear 20, revolving loose on said shaft and having a changeable gear 22, secured to its hub, the intermediate pinion 21, between said gears 17 and 20, said pinion being carried on a. radius-bar 34 about the center of shaft 15 and having its end attached to the end of a lever 38, fulcrumed to the frame 14, and having a roller 39 incontaet with a cam on the rim of gear 20, in combination with the roll 26, bottom-tuckingblade 47, bar 48, and the severing-blade 72, in combination with the feed-rolls 5- and 6, substantially as and for the purpose set forth.

ARTHUR L. STEVENS. 'Witnesses:

MINOR HARVEY, FRANK R. STEVENSEN. 

